Fig. 7From: A Review of the Evolution of Vision-Based Motion Analysis and the Integration of Advanced Computer Vision Methods Towards Developing a Markerless SystemThe generation of a visual hull, which is a type of 3D reconstruction of an object viewed from multiple cameras. Top row: images of an object are captured as 2D images from multiple directions. Middle row: these images are processed to produce silhouette images for each camera. Bottom left: the silhouettes are back-projected from each camera, resulting in cone-like regions of space. Bottom right: the intersection of these cones results in the visual hullBack to article page